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quorum: Make bdrv_dirname() return NULL 

While the common implementation for bdrv_dirname() should return NULL
for quorum BDSs already (because they do not have a file node and their
exact_filename field should be empty), there is no reason not to make
that explicit.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Message-id: 20190201192935.18394-17-mreitz@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
master
Max Reitz 2019-02-01 20:29:20 +01:00
parent 27953572a5
commit f3037bd254
1 changed files with 11 additions and 0 deletions
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11
block/quorum.c
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@ -1094,6 +1094,16 @@ static void quorum_refresh_filename(BlockDriverState *bs, QDict *options)
bs->full_open_options = opts;
}
static char *quorum_dirname(BlockDriverState *bs, Error **errp)
{
/* In general, there are multiple BDSs with different dirnames below this
* one; so there is no unique dirname we could return (unless all are equal
* by chance, or there is only one). Therefore, to be consistent, just
* always return NULL. */
error_setg(errp, "Cannot generate a base directory for quorum nodes");
return NULL;
}
static BlockDriver bdrv_quorum = {
.format_name = "quorum",
@ -1102,6 +1112,7 @@ static BlockDriver bdrv_quorum = {
.bdrv_open = quorum_open,
.bdrv_close = quorum_close,
.bdrv_refresh_filename = quorum_refresh_filename,
.bdrv_dirname = quorum_dirname,
.bdrv_co_flush_to_disk = quorum_co_flush,